regexp incompatibilites 7.3 and 7.4

Hi,

seems for regexp which works in 7.3 is failing in 7.4.
Is't possible to configure pgsql to be compatible with 7.3 regexp ?

Welcome to psql 7.3.4, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

discovery=# select 'problem' ~ '^\\p';
?column?
----------
t
(1 row)

Welcome to psql 7.4, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

www=# select 'problem' ~ '^\\p';
ERROR: invalid regular expression: invalid escape \ sequence

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
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